Varta element 6 User manual

VARTA Storage GmbH
OPERATING MANUAL
VARTA element backup

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Legal notice
Operating manual VARTA element backup
VARTA Storage GmbH
Nürnberger Straße 65
86720 Nördlingen
Germany
www.varta-ag.com
Tel.: [phone]
[e-mail]
Technical service:
If you require assistance in troubleshooting or installing your device, we will be glad to help you. Please contact
your local technical support. You will find the contact details at www.varta-storage.de.
DE - Technical service:
[e-mail]
Tel.: [phone]
Document number: 802970-02
Stand: 10/2021
Note to the electrical specialist
This manual contains, in the first part, general information on the operation of the VARTA
element backup energy storage system.
You will find further information in the Installation , Operation in the password-protected area
and Maintenance sections.

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Contents
GENERAL ...................................................................................................................................................................................................... 7
1 INFORMATION ABOUT THIS MANUAL ................................................................................................................................................................. 7
1.1 Symbol explanation ............................................................................................................................................................................ 7
1.2 Safety instructions.............................................................................................................................................................................. 7
1.2.1 Warning stages ........................................................................................................................................................................... 7
1.3 General safety signs...........................................................................................................................................................................8
1.4 Warning sign...........................................................................................................................................................................................8
2 SAFETY....................................................................................................................................................................................................................9
2.1 General information on safety......................................................................................................................................................9
2.2 Intended use...........................................................................................................................................................................................9
2.3 Disclaimer................................................................................................................................................................................................9
2.4 Erroneous use...................................................................................................................................................................................... 10
2.5 Prohibited use...................................................................................................................................................................................... 10
2.6 Requirements for electrical specialists................................................................................................................................ 10
2.7 General danger sources ..................................................................................................................................................................11
2.7.1 Danger due to electrical voltage......................................................................................................................................11
2.7.2 Danger due to water ...............................................................................................................................................................11
2.7.3 Danger due to oxidising and corrosive substances................................................................................................11
2.7.4 Danger due to heat ................................................................................................................................................................. 12
2.7.5 Danger due to misconduct ................................................................................................................................................. 12
2.7.6 Safety equipment .................................................................................................................................................................... 13
3 FUNCTION,SCOPE OF DELIVERY AND TECHNICAL PARAMETERS .............................................................................................................. 14
3.1 Function of the VARTA element backup................................................................................................................................ 14
3.1.1 Term definition.......................................................................................................................................................................... 14
3.2 Cascade mode:.................................................................................................................................................................................... 15
3.3 Scope of delivery DE ........................................................................................................................................................................ 15
3.4 View of the VARTA element backup......................................................................................................................................... 16
3.5 System overview Own consumption optimisation ........................................................................................................... 17
3.6 System overview with replacement power consumers ................................................................................................18
3.7 Identification ........................................................................................................................................................................................ 19
3.7.1 Type plate .................................................................................................................................................................................... 19
3.7.2 ID label of the battery module.......................................................................................................................................... 19
3.8 Technical parameters VARTA element backup ................................................................................................................ 20
3.9.1 Battery module ......................................................................................................................................................................... 21
3.9.2 Environmental rating............................................................................................................................................................. 21
3.10 Derating .................................................................................................................................................................................................. 21
4 REPLACEMENT POWER OPERATION VARTA ELEMENT BACKUP...............................................................................................................22
4.1 Replacement power box (Optional)..........................................................................................................................................22
4.2 Electrical consumers in the replacement power operation...................................................................................... 23
4.2.1 Notes on connection:............................................................................................................................................................ 23
4.2.2 Overload....................................................................................................................................................................................... 23
4.3 Black start ............................................................................................................................................................................................ 24
4.4 Testing the replacement power function ............................................................................................................................ 24
4.5 Activate replacement power function................................................................................................................................... 25
5 GUARANTEE ........................................................................................................................................................................................................ 25
5.1 Guarantee registration................................................................................................................................................................... 26
5.1.1 Part 1: Installer ......................................................................................................................................................................... 26
5.1.2 Part 2: End customer ............................................................................................................................................................ 26
OPERATION................................................................................................................................................................................................ 27
6 SWITCHING ON AND OFF,WEB INTERFACE ....................................................................................................................................................27
6.1 The VARTA element backup........................................................................................................................................................ 28
6.1.1 Switching on and off (VARTA element backup)...................................................................................................... 28

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6.1.2 VARTA element backup – switching on the replacement power mode.................................................... 28
6.2 Displays of the LED ring on the on/off switch .................................................................................................................. 28
6.3 The web interface............................................................................................................................................................................. 29
6.3.1 Access to the web interface............................................................................................................................................. 29
6.3.2 The Energy Manager.............................................................................................................................................................. 30
6.4 The portal ...............................................................................................................................................................................................31
7 MAINTENANCE AND CLEANING....................................................................................................................................................................... 32
7.1 Maintenance works.......................................................................................................................................................................... 32
7.2 Cleaning................................................................................................................................................................................................. 32
8 FAULT .................................................................................................................................................................................................................. 33
8.1 Fault displays...................................................................................................................................................................................... 33
8.1.1 Fault displays of the LED ring on the on/off switch ............................................................................................ 33
8.1.2 Faults displays on the web interface........................................................................................................................... 33
9 CASE OF DAMAGE .............................................................................................................................................................................................. 34
9.1 Behaviour in the event of damage ........................................................................................................................................... 34
INSTALLATION..........................................................................................................................................................................................35
10 TRANSPORT AND STORAGE .............................................................................................................................................................................. 35
10.1 Transport ............................................................................................................................................................................................... 35
10.2 Transport regulations and safety directions ...................................................................................................................... 35
10.3 Packaging/transport control ...................................................................................................................................................... 36
10.4 Storage ................................................................................................................................................................................................... 37
11 ASSEMBLY AND INSTALLATION .......................................................................................................................................................................38
11.1 Test components ..............................................................................................................................................................................38
11.2 Setup site requirements................................................................................................................................................................ 39
11.3 Suitable assembly sites ................................................................................................................................................................ 39
11.4 Setup site .............................................................................................................................................................................................. 39
11.4.1 Dimensions and equipment .............................................................................................................................................. 39
11.4.2 Environmental conditions .................................................................................................................................................. 40
11.4.3 Non-permitted locations and environmental conditions.................................................................................. 40
11.5 Preparation of the electrical connection..............................................................................................................................41
11.6 External power reduction ............................................................................................................................................................. 42
11.7 Connection plans of the VARTA element backup............................................................................................................ 43
11.7.1 VARTA element backup with replacement power box in the TT network ................................................ 43
11.7.2 VARTA element backup with replacement power box in the TN-C network .......................................... 44
11.7.3 VARTA element backup in the house installation in the TT network.......................................................... 45
11.7.4 VARTA element backup in the house installation in the TN-C network.................................................... 46
11.8 Network connection preparation (black plug)................................................................................................................... 47
11.8.1 Replacement power connection preparation (light grey plug) ...................................................................... 49
11.8.2 Connecting the VARTA Split Core current sensor................................................................................................. 50
11.9 Connecting the optional current sensor................................................................................................................................51
11.10 Assembly preparation..................................................................................................................................................................... 52
11.11 Setting up and connecting the storage cabinet ............................................................................................................... 52
11.11.1 Battery module assembly .................................................................................................................................................. 54
11.11.2 Opening the storage cabinet ............................................................................................................................................ 54
11.11.3 Check the battery modules............................................................................................................................................... 55
11.11.4 Behaviour in the event of damage................................................................................................................................. 55
11.11.5 Fit and connect battery modules................................................................................................................................... 56
11.11.6 Connections on the battery module ..............................................................................................................................57
11.11.7 Connections on the battery charger (front)...............................................................................................................57
11.11.8 Position of the battery modules ..................................................................................................................................... 58
11.11.9 Element 6 - Fit and connect battery module........................................................................................................... 59
11.11.10 Element 12 - Fit and connect battery modules....................................................................................................... 60
11.11.11 Element 18 - Fit and connect battery modules ...................................................................................................... 62
11.11.12 Closing the storage cabinet.............................................................................................................................................. 63

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11.12 Initial start-up..................................................................................................................................................................................... 64
11.12.1 Check activation of the battery modules .................................................................................................................. 64
11.12.2 Password entry ........................................................................................................................................................................ 65
11.12.3 Quick Install - basic settings ........................................................................................................................................... 68
11.12.4 Quick Install - network ........................................................................................................................................................ 69
11.12.5 Quick Install - network .........................................................................................................................................................70
11.13 Checking the system ....................................................................................................................................................................... 71
11.13.1 Check on the homepage...................................................................................................................................................... 71
11.13.2 Checks on the system page...............................................................................................................................................72
11.13.3 Checking the connections on the battery converter............................................................................................73
11.13.4 Checking the battery modules .........................................................................................................................................73
11.14 Checking the replacement power network .........................................................................................................................73
11.15 Black start key test...........................................................................................................................................................................73
11.15.1 Leaving the password-protected area .........................................................................................................................74
OPERATION IN THE PASSWORD-PROTECTED AREA ...................................................................................................................75
12 THE PASSWORD-PROTECTED AREA.................................................................................................................................................................75
12.1 Access to the password entry web interface .....................................................................................................................75
12.2 The system menu...............................................................................................................................................................................76
12.3 The version menu...............................................................................................................................................................................77
12.4 The settings menu.............................................................................................................................................................................78
12.4.1 Basic settings............................................................................................................................................................................78
12.4.2 Network/portal connection................................................................................................................................................79
12.4.3 Reboot ...........................................................................................................................................................................................79
12.4.4 Service settings........................................................................................................................................................................79
12.4.5 Network ....................................................................................................................................................................................... 80
12.4.6 Setting according to Q(U) characteristic................................................................................................................... 83
12.5 The power restriction menu........................................................................................................................................................ 84
12.6 Leaving the password-protected area .................................................................................................................................. 84
MAINTENANCE .........................................................................................................................................................................................85
13 BASIC INFORMATION ON MAINTENANCE....................................................................................................................................................... 85
13.1 Safety instructions........................................................................................................................................................................... 85
13.2 Scope of the maintenanceworks.............................................................................................................................................. 86
13.3 Service and repair works .............................................................................................................................................................. 86
13.4 External check of the storage cabinet ...................................................................................................................................87
13.5 Checking the system parameters (service).........................................................................................................................87
13.5.1 Checking the online status ................................................................................................................................................87
13.5.2 Error lists .................................................................................................................................................................................... 88
13.5.3 Eliminating faults ................................................................................................................................................................... 88
13.5.4 Check software version ...................................................................................................................................................... 89
13.5.5 Air filter change: Reset time............................................................................................................................................. 89
13.5.6 Check ventilator...................................................................................................................................................................... 90
13.6 Checking the system parameters............................................................................................................................................. 91
13.6.1 Checking the current sensor values ............................................................................................................................. 91
13.6.2 Measures in the event of conspicuous current sensor values:...................................................................... 92
13.7 Check battery charger ................................................................................................................................................................... 92
13.8 Check the battery modules ......................................................................................................................................................... 92
13.9 Checking the replacement power network ........................................................................................................................ 92
13.9.1 Black start key test ............................................................................................................................................................... 92
13.10 Service and repair: Cabinet interior......................................................................................................................................... 93
13.10.1 Opening the cabinet.............................................................................................................................................................. 94
13.10.2 Replace the SD card ............................................................................................................................................................. 94
13.10.3 Dismounting the battery converter............................................................................................................................... 94
13.10.4 Dismounting and installing the battery charger.................................................................................................... 95
13.10.5 Connections on the battery charger front................................................................................................................. 96

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13.10.6 View of the battery charger from behind................................................................................................................... 96
13.10.7 VARTA element backup Install battery charger..................................................................................................... 96
13.10.8 Dismounting and installing the battery modules .................................................................................................. 98
13.10.9 Replacing and cleaning the air filter............................................................................................................................ 99
13.10.10 Dismounting the cover of the storage cabinet ....................................................................................................... 99
13.10.11 Cleaning or replacing the ventilator........................................................................................................................... 100
13.11 Completing the service and repair works........................................................................................................................... 101
13.11.1 Check operating status ......................................................................................................................................................102
13.12 Cleaning................................................................................................................................................................................................102
14 FAULTS .............................................................................................................................................................................................................. 103
14.1 Faults displays of the LED ring................................................................................................................................................ 103
14.2 Faults displays on the web interface ................................................................................................................................... 103
15 DISMOUNT AND DISPOSAL ............................................................................................................................................................................. 103
15.1 Planning dismount ......................................................................................................................................................................... 103
15.2 Carry out dismount......................................................................................................................................................................... 104
15.3 Disposal................................................................................................................................................................................................ 104
16 MOVE.................................................................................................................................................................................................................. 104
16.1 Planning a move.............................................................................................................................................................................. 104
16.2 Carrying out a move....................................................................................................................................................................... 105
17 SPARE PARTS ................................................................................................................................................................................................... 106
18 DOCUMENTATION ............................................................................................................................................................................................ 106
18.1 Service works.....................................................................................................................................................................................107
18.2 Repair / other works...................................................................................................................................................................... 108
19 APPENDIX.......................................................................................................................................................................................................... 109
19.1 Figures.................................................................................................................................................................................................. 109
19.2 Tables.................................................................................................................................................................................................... 109

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About this manual
Read this operating manual through carefully before beginning any work. It contains important advice to ensure
flawless functioning of the VARTA element backup energy storage system. The manual is structured in such a
way that all work must be performed by a qualified electrical specialist who is certified by VARTA Storage
GmbH.
Target groups
This manual is directed at various target groups:
• End customers
• Electrical specialists responsible for installation, commissioning and maintenance.
Scope of application
This manual is part of the system and corresponds to the technical state-of-the-art at the time of publication. It
applies to the product VARTA element backup in the expansion stages: 6, 12 and 18 kWh, as of serial number
127XXXXXX (type plate).
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Please note that this operating manual also refers to optional components that are not included as
standard in the scope of delivery.
These components and/or system parts are marked in this manual as “optional”. Simply skip these
parts of the manual if your energy store is not equipped with them.
General equal treatment
VARTA Storage GmbH is conscious of the significance of language in relation to the equal treatment of men and
women. For ease of legibility, no gender-specific differentiation is deployed. In the interests of equal treatment,
corresponding terms apply to both sexes.
Notice for special attention
Depending on the network quality and the occurrence of network faults, the grid and plant protection can be
triggered and the replacement power network transitioned to at interruption times. VARTA Storage GmbH
assumes no liability for resulting damage.
Performing reconstructions or technical alterations to the product on one’s own authority is prohibited.
© VARTA Storage GmbH 2021
ATTENTION
Energy store switched off!
Possible damage to the batter module due to deep discharge.
The energy storage system may be switched off only temporarily for
maintenance purposes.

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General
1 Information about this manual
1.1 Symbol explanation
The following types of safety directions and tips are used in this operating manual
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Indicates tips regarding use of the device.
1.2 Safety instructions
In this manual, the safety directions are structured as follows:
Signal word
Type and source of danger!
Possible consequence(s) in the event of non-compliance.
Measure and prohibitions to avoid the danger.
1.2.1 Warning stages
Signal word and warning colour identify the warning stage and provide an immediate indication of the type and
severity of consequences if the measures to avoid the danger are not followed.
Warning colour / signal word
Consequences
warns of a directly dangerous situation that can lead to death or to serious
injuries and/or fire.
DANGER
warns of a possibly dangerous situation that can lead to death or to
serious injuries and/or fire.
WARNING
warns of a possibly dangerous situation that can lead to light injuries
and/or material damage.
CAUTION
warns of a possible situation that can lead to material and environmental
damage and disrupt operations.
ATTENTION

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1.3 General safety signs
Symbol
Meaning
Prohibition signs are round, with a black pictogram, on a white background
and a red border and crossbar.
Prohibition signs are round, with a white symbol, on a blue background.
Warning signs are triangular, with a black symbol and border, on a yellow
background.
Environmental regulations are indications of state regulations to be complied
with, particularly in relation to disposal.
1.4 Warning sign
General warning sign
Warning of hand injuries
Warning of electric shock
Warning of cut injuries
Warning of oxidising substances
Warning of dangers due to
batteries
warning of non-compliance with the discharge time.
Comply with a waiting time of at least 3 minutes.

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2 Safety
2.1 General information on safety
Each person mandated with works on the system must have read and understood this manual and especially
the “Safety” chapter.
WARNING
Non-compliance with the safety instructions!
Improper use can lead to fatal injuries.
Before use, ensure that all the protective equipment works.
Compliance with the safety directions and the occupational safety measures in which training is provided limits
the risk.
Read the operating manual.
This manual cannot describe every conceivable situation; therefore, the applicable standards as well as the
corresponding regulations for occupational health and safety always have priority. Additionally, use of the
energy storage system is associated with residual dangers under the following circumstances:
• The installation and maintenance works are not carried out properly.
• The installation and maintenance works are carried out by untrained and non-instructed personnel.
• The safety directions provided in this manual are not followed.
All safety directions must be followed without fail; compliance with them is for your safety. No modifications
may be made to the device.
2.2 Intended use
The VARTA element backup with its components is built according to the state of the art and the product-
specific standards and is to be used for the storage of electricity from photovoltaic systems. Other uses must
be coordinated with the manufacturer and the local energy supplier.
In the event of a power failure, the replacement power function of the VARTA element backup is to enable the
supply of selected consumers in the household. The technical parameters described in chapter 3.8 from page
20 indicate the efficiency of the store. In the rarest of cases, these power values will suffice to supply a home
completely with power. Connect selected consumers to the replacement power network. To ensure that these
consumers will be safely supplied in the event of a power failure, test the function as described in chapter 4.4
“Testing the replacement power function” on page 24.
• The replacement power function of the VARTA element backup is not an uninterrupted power supply
(UPS) or safety power supply.
• When switching from mains to replacement power and back, a supply interruption occurs.
2.3 Disclaimer
VARTA Storage GmbH assumes no liability for damage to consumers in the replacement power network that
has occurred due to the triggering of the grid and plant protection owing to network faults.

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2.4 Erroneous use
WARNING
Possible danger to life due to erroneous use!
Possible danger to life.
In the interior of the device there are parts with dangerous voltages. Contact
with these can lead to death.
Any use that goes beyond the intended use or other use of the energy storage
system or individual parts can lead to life-threatening situations.
The store does not provide a UPS functionality.
When switching from mains to replacement power and back, a supply
interruption occurs.
Do not move any devices on which the omission of the replacement power
supply leads to material damage.
Do not move any devices on which the omission of the replacement power
supply leads to personal damage.
2.5 Prohibited use
Do not use VARTA element backup:
• for mobile use on land, water, or in the air,
• for permanently off-grid operation,
• for use on medical equipment,
• for use as a safety power supply,
• to connect the replacement power network of several stores simultaneously,
• do not cascade any further energy stores in the replacement power network,
• to connect generator systems to the replacement power network.
2.6 Requirements for electrical specialists
WARNING
Insufficient qualification of the electrical specialist.
Personal and material damage.
Activities on the VARTA element backup system (e.g. installation and
maintenance work) may be performed by qualified electrical specialists
certified by VARTA Storage only.
Here, specialists refers to persons who, among other things, possess the knowledge of relevant terms
and skills.
Are able to evaluate the following works and recognise possible dangers due to their technical training,
knowledge and experience as well as knowledge of the relevant provisions:
• Assembly of electrical equipment.
• Assembly and connection of data lines.
• Assembly and connection of power supply lines.
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The “Installation”, “Operation in the password-protected area” and “Maintenance”
sections contain further information for the electrical specialists.

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2.7 General danger sources
If the following directions on handling the device are not complied with, this can lead to personal damage and
material damage to the device for which VARTA Storage GmbH assumes no liability.
2.7.1 Danger due to electrical voltage
DANGER
Contact with electrical voltage.
Danger to life due to electric shock.
Always keep the energy store closed.
Look out for damage to the electrical equipment.
Have defects eliminated immediately.
Only the electrical specialist is allowed to open the energy store.
The energy store may be opened only while switched off.
Comply with a waiting time of at least 3 minutes.
DANGER
Contact with electrical voltage.
Danger to life due to electric shock on the replacement power connection.
Only the electrical specialist is allowed to open the energy store.
Switch off the energy store.
Ensure that the supply line of the system is disconnected from the mains.
Comply with a waiting time of at least 3 minutes.
2.7.2 Danger due to water
WARNING
Entry of water into electrical installations.
Possible danger to life and material damage.
Do not use water to clean the energy store.
Do not deposit containers with liquids (such as drinks cups) on electrical
installations.
The relative humidity in the room must not exceed 80%.
2.7.3 Danger due to oxidising and corrosive substances
WARNING
Storage and use of oxidising and/or corrosive substances.
Increases the fire risk and the risk of electric shocks.
Store the above-named substances only in the places intended for them.
Do not clean the system with acid-, lye- or solvent-containing means.

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2.7.4 Danger due to heat
ATTENTION
Insufficient ventilation of the system!
Overheating of the system possible.
Keep vents clear.
Ensure sufficient ventilation.
ATTENTION
Heat entry due to direct solar radiation or devices that emit heat!
Overheating of and damage to the system possible.
Protect system from direct solar radiation.
Do not use a fan heater or a similar device near the system.
2.7.5 Danger due to misconduct
ATTENTION
Energy store switched off!
Possible damage to the batter module due to deep discharge.
The energy storage system may be switched off only temporarily for
maintenance purposes.
ATTENTION
Objects on the system!
Risk of injury due to falling objects and the system can be damaged.
Do not deposit objects on the energy store.
ATTENTION
Access blocked!
System cannot be switched off in the event of damage.
Access to the energy store must be ensured at all times.

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2.7.6 Safety equipment
WARNING
Defective safety equipment!
Possible danger to life.
Safety equipment must not be damaged, modified, removed or decommissioned.
The flawless functioning of the safety equipment must be checked following the
end of the installation and commissioning by qualified electrical specialists
certified by VARTA.
The VARTA element backup energy storage system has several pieces of safety equipment. These include grid
and system protection according to VDE-AR-N 4105, closed electrical operating area, overtemperature switch-
off and a door switch. The latter switches the energy store off if an attempt is made to open the storage cabinet
without previously disconnecting it from the mains.
• According to the country-specific specifications, the installation of a switch-off mechanism may be
necessary.
• Switching off does not disconnect the replacement power connection of a VARTA element backup from
the mains.
A smoke detector must be installed in the setup room of the VARTA element backup.

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3 Function, scope of delivery and technical parameters
3.1 Function of the VARTA element backup
The VARTA element backup energy storage system is a storage system for operation in a 3-phase house
network with the option of connecting a separate grid-connected photovoltaic system. The latter must be a
generation system that feeds in not at full infeed, but after excess.
The VARTA element backup system serves to increase the percentage of self-consumption and the economic
efficiency of a photovoltaic system. If the photovoltaic system produces more electricity than is immediately
consumed, it can be stored intermediately in the energy storage system. The electricity is fed into the house
network again from the store as soon as the consumption is bigger again than the electricity quantity generated
by the photovoltaic system.
The VARTA element backup system is integrated into the house network triple-phase on the alternating current
side and works independently of the photovoltaic system.
A current sensor controls the charging and discharging processes of the energy storage system. If the current
sensor measures outgoing currents while there is available free charging capacity of the energy storage
system, the latter is charged. In the process, the batter converter in the VARTA element backup system converts
the alternating current into direct current and charges the battery modules. If the maximum charging capacity
is reached or if the solar-produced electricity exceeds the maximum charging current, the excess solar power is
fed into the public network. If the photovoltaic system cannot cover the current electricity requirements in the
house, the current sensor measures incoming currents. Thereupon, the energy storage system issues power
into the house network in order to minimise the external volume of purchased electricity and the associated
costs.
Additionally, the VARTA element backup offers a replacement power function. With a VARTA element backup,
selected electrical consumers can be supplied with electrical energy on the replacement power network even
in the event of a power failure. To this end, the store keeps a reserve capacity ready that can be used in the
event of a power failure.
In the integrated network operation, the electrical consumers connected to the replacement power network are
supplied from the integrated network. To this end, the energy is not conducted through the batteries, but
“looped through” the store (bypass). In the event of a power failure in the integrated network, the replacement
power network is supplied after a short interruption. Once the integrated network is stable again, the supply is
switched to the integrated network. Here, there is a short interruption in the replacement power network. In the
event of a power failure, the “black start” button allows manual start-up in the replacement power mode.
• The replacement power function of the VARTA element backup is not an uninterrupted power supply
(UPS) or safety power supply.
3.1.1 Term definition
3.1.1.1 Bypass
Consumers connected to the replacement power network are also monitored in the integrated network
operation by grid and plant protection. If a network fault is detected in the integrated network mode, these
consumers must be switched off, provided the network fault is pending.
• Thus, interruptions of the consumers on the replacement power connection can occur in the integrated
mode.
3.1.1.2 Integrated network operation
The public electricity network (integrated network) is available. Electrical consumers connected to the
replacement power network are supplied by the integrated network.
3.1.1.3 Replacement power network
The public electricity network (integrated network) is not available. Electrical consumers connected to the
replacement power network are supplied by the storage system. Replacement power network refers to the part
of the customer’s system that is connected to the replacement power connection of the store (compare
chapter 11.7: “Connection plans of the VARTA element backup”, beginning on page 43). This includes the safety
equipment (fuses, RCDs) as well as the connected consumers.

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3.1.1.4 Black start
Starting the store during the time of a failure of the public electricity network is referred to as a black start.
• The replacement power function of the VARTA element backup is not an uninterrupted power supply
(UPS) or safety power supply.
Note: Before installation of the VARTA element backup, it must be clarified with the respective energy supply
company whether it is necessary to register the system.
3.2 Cascade mode:
• In cascade mode, only one energy store can be used to supply replacement power.
• If the replacement power function is activated on several energy stores, no energy store will supply
replacement power.
3.3 Scope of delivery DE
The VARTA element backup energy storage system includes: a storage cabinet with integrated energy and
battery management, battery module(s) and battery converters.
VARTA element backup
6
12
18
Number of battery chargers
1
2
3
Number of communication cable sets
1
2
3
Number of power cables
1
2
3
Number of accessories kits
1
1
1
Accessories kit:
VARTA Split Core current sensor,
20 m sensor cable,
1 x AC connector,
12 x fastening screws for battery module(s),
1 x user manual,
1 x AC connection socket replacement power,
1 x earthing connection set consisting of an M6 nut, 2 washers and a chopper disc.
Optional
VARTA replacement power box

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3.4 View of the VARTA element backup
No.
Description
No.
Description
1
Cover
4
Screws for opening the door
2
Type plate
5
Black start button
3
On/off switch
6
Ventilation grid

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3.5 System overview Own consumption optimisation
This system overview shows the classic use of a VARTA element backup for own consumption optimisation. The
replacement power function is not used here.
No.
Description
No.
Description
1
Photovoltaic system
4
Consumers in the household
2
Converter for photovoltaic system
5
Current sensor
3
VARTA element backup

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3.6 System overview with replacement power consumers
This system overview shows the layout of a VARTA element backup system with connected replacement power
consumers. In the event of a power failure, the consumers shown in (5) are supplied by the storage system.
No.
Description
No.
Description
1
Photovoltaic system
5
Consumers entitled to replacement power
2
Converter for photovoltaic system
6
Consumers in the household
3
VARTA element backup
7
Current sensor
4
VARTA replacement power box